// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/// Process the input data and return the result.
pub trait Process {
    type Inp;
    type Ret;

    /// It returns None if nothing has to be done.
    /// Otherwise it returns Some(converted_data).
    fn process(&self, input: Self::Inp) -> Result<Option<Self::Ret>, anyhow::Error>;
}
